deepakrajanna We just entered a new quarter on the first of September. Teachers who hadn't marked attendance for the last few days of August are unable to do so and I'm not able to figure out why this is happening.
Yes, after reviewing the code, teachers are not allowed to edit past quarter attendance.
The only trick is to set the "Grade Posting Ends" date (see School > Marking Periods) for this past quarter to today or a future date.
The logic is summed up in this PHP comment:
Allow teacher edit if selected date is in the current quarter or in the corresponding grade posting period